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US4052322A
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Corrosion-inhibited grease compositions
Assignee: Texaco Inc
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Filing: 1976-06-24
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Granted: 1977-10-04
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Expires: 1996-06-24
Abstract
Abstract Described are lubricating greases corrosion inhibited by a synergistic amount of a mixture of sodium nitrite and N-acyl sarcosines. The greases contain from 75 to 96 parts by weight, preferably 80 to 95 parts by weight of a mineral oil having a SUS viscosity of 50 to 2500 at 100° F thickened to grease consistency with about 3 to 25, preferably 5 to 20, parts by weight of an alkali metal or alkaline earth metal soap or a mixture thereof.
Inventors
- 👤 Fred T. Crookshank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:03
CPC Classifications
C; C10; C10M; C10M5/00; C10M2201/00; C10M2201/08; C10M2201/082; C10M2201/083; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/103; C10M2215/00; C10M2215/08; C10M2215/082; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/28; C10M2215/30; C10M2219/00; C10M2219/04; C10M2219/044; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2227/00; C10M2227/02; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2010/00; C10N2010/02; C10N2040/00; C10N2040/02; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
149 words
A lubricating grease having superior anti-corrosive properties comprising a homogeneous admixture of the following components in their indicated range of proportions: a. from about 75 to 96 parts by weight of oil of lubricating viscosity thickened to grease consistency with about 2 to 25 parts by weight of a soap selected from the group consisting of alkali metal soaps, alkaline earth metal soaps and mixtures thereof, and b. from about 1.0 to 10.0 parts by weight of a corrosion-inhibiting composition comprising: 1. at least one inorganic nitrite, 2. at least one N-acyl sarcosine selected from the group consisting of lauroyl sarcosine, cocoyl sarcosine, oleoyl sarcosine, stearoyl sarcosine, fatty acid sarcosines containing from 8 to 22 carbon atoms per molecule and mixtures thereof, the weight ratio of sarcosine to nitrite varying from about 0.05 to 7.5 parts by weight of sarcosine to 0.075 to 7.5 parts of weight of nitrite.
Claim 2
Dependent Claim
149 words
A lubricating grease having superior anti-corrosive properties comprising a homogeneous admixture of the following components in their indicated range of proportions: a. from about 75 to 96 parts by weight of oil of lubricating viscosity thickened to grease consistency with about 2 to 25 parts by weight of a soap selected from the group consisting of alkali metal soaps, alkaline earth metal soaps and mixtures thereof, and b. from about 1.0 to 10.0 parts by weight of a corrosion-inhibiting composition comprising: 1. at least one inorganic nitrite, 2. at least one N-acyl sarcosine selected from the group consisting of lauroyl sarcosine, cocoyl sarcosine, oleoyl sarcosine, stearoyl sarcosine, fatty acid sarcosines containing from 8 to 22 carbon atoms per molecule and mixtures thereof, the weight ratio of sarcosine to nitrite varying from about 0.05 to 7.5 parts by weight of sarcosine to 0.075 to 7.5 parts of weight of nitrite.
Claim 3
Dependent Claim
14 words
The grease of claim 1 wherein the inorganic nitrite is an alkali metal nitrite.
Claim 4
Dependent Claim
16 words
The grease of claim 2 wherein the grease contains an emulsifiable polyalkylene polymer as an additive.
Claim 5
Dependent Claim
21 words
The grease of claim 2 wherein the nitrite is an alkali metal nitrite and the soap is an alkali metal soap.
Claim 6
Dependent Claim
72 words
A lubricating sodium soap-based grease comprising a homogeneous admixture of the following components in the indicated proportions: a. from about 80 to 95 parts by weight of a mineral oil having a SUS viscosity of 50 to 2500 at 100° F, thickened to grease consistency with about 5 to 20 parts by weight of a sodium soap, and b. from about 1 to 20 parts by weight of a corrosion-inhibiting composition comprising
Claim 7
Dependent Claim
72 words
A lubricating sodium soap-based grease comprising a homogeneous admixture of the following components in the indicated proportions: a. from about 80 to 95 parts by weight of a mineral oil having a SUS viscosity of 50 to 2500 at 100° F, thickened to grease consistency with about 5 to 20 parts by weight of a sodium soap, and b. from about 1 to 20 parts by weight of a corrosion-inhibiting composition comprising
Claim 8
Dependent Claim
35 words
from about 0.01 to 7.5 parts by weight of sodium nitrite, and 2. from about 0.05 to 7.5 parts by weight of cocoyl sarcosine; and c. about 3 parts by weight of an oxidation inhibitor.
Claim 9
Dependent Claim
35 words
from about 0.01 to 7.5 parts by weight of sodium nitrite, and 2. from about 0.05 to 7.5 parts by weight of cocoyl sarcosine; and c. about 3 parts by weight of an oxidation inhibitor.
Claim 10
Dependent Claim
16 words
The admixture of claim 5, wherein the sodium soap is the sodium salt of myristic acid.
Claim 11
Dependent Claim
18 words
The admixture of claim 5, wherein the sodium soap is the sodium salt of a tallow fatty acid.
Claim 12
Dependent Claim
19 words
The admixture of claim 5, wherein the mineral oil is a mixture of paraffinic distillate, and/or residual paraffinic oils.
Claim 13
Dependent Claim
19 words
The admixture of claim 5, wherein the mineral oil has a viscosity of about 1350 SUS at 100° F.
Claim 14
Dependent Claim
135 words
A synergistic corrosion-inhibitor composition which can be incorporated into greases in the proportion of from about 1.0 to 10.0 parts by weight of said inhibitor composition for each 100 parts by weight of finished grease comprising: a. from about 0.01 to 9.5 parts by weight of an inorganic nitrite selected from the group consisting of alkali metal nitrites, alkaline earth metal nitrites and mixtures thereof, and b. from about 0.05 to 9.5 parts by weight of an N-acyl sarcosine selected from the group consisting of lauroyl sarcosine, cocoyl sarcosine, oleoyl sarcosine, stearoyl sarcosine, fatty acid sarcosines containing from 8 to 22 carbon atoms per molecule and mixtures thereof, the weight ratio of sarcosine to nitrite varying from about 0.05 to 7.5 parts by weight of sarcosine to 0.075 to 7.5 parts by weight of nitrite.
Claim 15
Dependent Claim
135 words
A synergistic corrosion-inhibitor composition which can be incorporated into greases in the proportion of from about 1.0 to 10.0 parts by weight of said inhibitor composition for each 100 parts by weight of finished grease comprising: a. from about 0.01 to 9.5 parts by weight of an inorganic nitrite selected from the group consisting of alkali metal nitrites, alkaline earth metal nitrites and mixtures thereof, and b. from about 0.05 to 9.5 parts by weight of an N-acyl sarcosine selected from the group consisting of lauroyl sarcosine, cocoyl sarcosine, oleoyl sarcosine, stearoyl sarcosine, fatty acid sarcosines containing from 8 to 22 carbon atoms per molecule and mixtures thereof, the weight ratio of sarcosine to nitrite varying from about 0.05 to 7.5 parts by weight of sarcosine to 0.075 to 7.5 parts by weight of nitrite.
Claim 16
Dependent Claim
19 words
The composition of claim 10, wherein said inorganic nitrite is sodium nitrite and said N-acyl sarcosine is cocoyl sarcosine.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-03 | 1981-04-04 | 1981-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-03 | 1985-04-04 | 1985-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-03 | 1989-04-04 | 1989-10-04 | $7700.00 | Window Closed / Lapsed |